OK guys I some how let a 1/8" spot of rust creep into the receiever of my GAP M40. I clean it after every range, its coated with frog lube, not sure what I did wrong. Any way, I cant seem to rid the area of the cancer. Ive tried Boretech, CLP, and WD-40 rust remover with zero luck. Ideas??? Im embarrased, hopefully you guys can help!